Overview
The CD4017BK, manufactured by Harris Corporation, is a CMOS-based Johnson decimal counter with integrated 10-stage decoding. This IC is widely used in low-range counting applications due to its ability to count from 0 to 9 and provide decoded outputs. It is particularly valued for its simplicity, reliability, and versatility in various electronic circuits. The CD4017BK is designed for applications requiring sequential control or pulse distribution, making it a popular choice among hobbyists and professionals alike.
Key Specifications
| Parameter | Value | Unit | Notes |
|---|---|---|---|
| Supply Voltage | 3 to 15 | V | Typical operating range |
| Operating Temperature | -40 to 85 | °C | Industrial grade |
| Clock Frequency | Up to 2.5 | MHz | Maximum recommended |
| Output Current | 10 | mA | Per output pin |
| Package | DIP-16 | - | Common package type |
Key Features
- Decodes 10-stage Johnson counter outputs sequentially.
- Built-in Schmitt trigger for noise immunity on clock inputs.
- Supports both rising and falling edge clock inputs for flexible counting.
- Carry output facilitates cascading for extended counting ranges.
- Low power consumption, making it suitable for battery-operated devices.
Applications
The CD4017BK is extensively used in applications such as LED chasers, sequential lighting systems, frequency dividers, and control circuits in consumer electronics. Its ability to provide sequential outputs makes it ideal for creating visually appealing effects in display panels and decorative lighting. Additionally, it is employed in industrial automation for process control and timing circuits.
Q & A
What is the maximum clock frequency for CD4017BK?
The maximum recommended clock frequency is 2.5 MHz.
Can CD4017BK be used with a 5V supply?
Yes, it operates reliably within a supply voltage range of 3 to 15V, including 5V.
How many outputs does CD4017BK have?
It has 10 decoded outputs (Q0 to Q9) and one carry output.
What is the purpose of the carry output?
The carry output provides a pulse every 10 clock cycles, enabling cascading of multiple CD4017BK ICs.
Is CD4017BK suitable for high-temperature environments?
Yes, it operates in temperatures ranging from -40°C to 85°C.
Can CD4017BK be used for frequency division?
Yes, it can divide the input clock frequency by 10.
What is the typical power consumption of CD4017BK?
It has a low static current of 0.04 µA, making it energy-efficient.
Does CD4017BK support both rising and falling edge clock inputs?
Yes, it supports both types of clock inputs for flexible counting.
What is the function of the reset pin?
The reset pin, when activated, clears the counter and sets the output Q0 to high.
Can CD4017BK drive LEDs directly?
Yes, each output can drive an LED with a current of up to 10 mA.
